Hoist



Patented Jan. 15, 1946 UNITED STATES PATENT OFFICE" 2,392,986 HOIST Delbert V. Hello, Farmington, Ill. Application April 24, 1944, Serial No. 532,513

6 Claims.

This invention relates to improvements in lo handling machines or hoists and more particularly to a machine adapted preferably to be mounted to a motorized vehicle and operated in connection therewith for use in the lumber and logging businesses, about logging camps, saw mills, and elsewhere for transporting, lifting, loading and unloading and, in general, handling logs principally, although capable of other uses.

One object is to provide a machine of this type that operates from the vehicle, raising, lowering, dragging or otherwise handling a heavy load without overbalancing the vehicle. A further object is to provide a machine of this type that is compact in assembly, of durable rugged construction, facile of operation, efilcient in use and inexpensive to manufacture.

A still further object is to provide a log handling machine, vehicle mounted, that when in use handling very heavy loads does not materially shift the center of gravity of the vehicle due to a jackknife action of the operating mechanism which permits the machine to operate with great safety, with precision and with little vibration or lost motion in use.

A still further object is to provide a log handling machine or hoist of few parts that handles very readily, that has great load capacity and that positively takes the worry and hard unpleasant work out of logging, one of the toughest jobs,

and that provides means for speedily and easily handling heavy loads, not only in the logging field but equally well in oil fields, handling pipe, and elsewhere where heavy cumbersome material must be dealt with.

With the foregoing and other objects in view the invention consists in the combination and arrangement of parts to be hereinafter described, pointed out in the claims and illustrated in the drawings which form a part of this patent, and in which: I

Fig. 1 is a side view of the machine mounted to a truck or vehicle body, illustrating its application, two positions of certain parts of the machine being shown.

Fig. 2 is a view similar to Fig. 1 but showin the movable parts in a further altered position.

Fig. 3 is a top plan view of the machine and a portion of the vehicle.

Fig. 4 is an enlarged fragmentary view partly in section and partly in elevation and taken on the line 4-4 of Fig. 1, and,

Fig. 5 is a view similar to Fig. 4 buttaken on the line 5-5 of Fig. 1.

Like reference characters denote corresponding parts throughout the several views.

The reference numeral l denotes the frame or chassis of a truck, 2 the rear wheels and 3 the transmission shaft to whichis connected, by sprocket wheels l and chain 5, the winch 6 arranged upon the'platform I of channel iron or other suitable material disposed upon the said frame I with the axis of the winch positioned forwardly of the axis of the rear wheels. If preferred the winch may be operated by a separate motor instead of from the transmission shaft and vehicle motor.

Secured to the platform 1 at'each rear corner of the same is a long leg 8 and a short leg 9, said legs being spaced apart to receive therebetween upon a pin II) the reduced end of an arm H, one arm being provided upon each'side of said platform, said arms being connected by cross braces Ila and each being formed preferably of two channel irons secured together and receiving throughout their length wooden posts bolted thereto. The opposite 'ends of said arms, also reduced, are pivotally arranged upon pins l2 that also pivotally receive the reduced ends of the sides of a V-shaped boom l3 that extends rearwardly beyond the end of the frame and platform, said boom in lowered position resting upon the upper ends of spaced upright supports M, M.

' V The 'said posts l4, M are secured upon the platform and are each preferably formed of two pieces of channel iron secured together and receiving wood posts extending therethrough, said posts extending upwardly above said channels to directly receive said boom and being bolted in position at points l5, one side of one channel of each support extending upwardly thus forming guides It for said boom when the same is at rest or in lowermost position. Also pivotally secured to the pins 12 are the rear ends of the Y-shaped connector frame 11, the sides of the open or wide end of the Y being of two piece formation connected by tie bars l8, 19 the shorter pieces being secured by rivets 20 and the longer pieces by rivet or bolt 2| to a slide beam 22 movable longitudinally through a sleeve 23 fixedly secured to a collar 24 the ends of which are pivotally secured to a bracket 25 secured to a link 26 connecting the sides of the anchor frame or tower 21, the lower ends of which are bolted to said frame I, the upper end members of said tower being connected by a tubular bridge link 28 to which the bracket 29 for a sheave 30 is secured about which the winding cable 3| passes that also passes about the sheave 32 secured to the boom l3 and to and about the rotary shaft 33 arranged in brackets 34 carried by the sides of said tower, said shaft having a hand crank 35 adapted for engagement with the crank stop 36, secured to said tower, in one position of said stop- Guy ropes 31 secured to said bridge link 28 connect same to the front end of the truck frame.

Secured to the forward end of the slide beam is acollar 38 connected by a winding cable 39 to a rotary shaft carried by bracket 4| secured to the tower or' frame 21, said shaft being pro.- vided with an operating hand crank 42 adapted for engagement with a stop 43, secured to said frame, in one stop position, said stop being movable into an out of the way position when the shaft is to be rotated. Braces 44 connecting the platform 1 and the sides of the frame 21 anchor the same firmly in position.

Rising from and secured to the platform I are the standards 45, one upon each side of said platform directly opposite each other, each standard having a rearwardly beveled upper end 143 and each standard being further anchored to said platform by a brace 47. Referring again to the arms H, two in number, they are of the same length and directly opposite each other and may bemoved upon their pivots through parallel arcs and disposed in the paths of movement of said arms are the standards 35 so that inone position of said arms they together with the adjacent ends of the boom l3 and connector frame I! may rest upon and be supported by said standards as shown in full lines in Fig. 1.. g

With the movable machine parts in the position shown in full lines, Fig. l, a winding cable 48 upon the winch 6 extends rearwardly between the upright supports i4, i4 and over a sheave 49 arranged in a block 58 securedby its hook 5| to a loop 52 secured to the closed rear end of said V-boom l3 and connected thereto by braces 53a that help greatly to support the load when the boom is at or near vertical position, said cable having secured to its free end the hook 53,said cable and hook being adapted for engagement with one end of a log 54, or other'load, whereby the same may be raised partly off the ground. In this position the log may be dragged by thetruck to any point desired. The weight of the load is sustained by the block 50, boom I3, supports l4, 14, standards 45, 45, by cable 48 and winch 6. It will be noted that the slide beam 22 is in its most forward position. The end of the boom is raised at one end by rotation of hand crank 35 and the log is raised by the winch. To pass the cable and hook about the end of the log while the same is upon the ground a slight furrow in the earth beneath the log may be dug out and the cable and hook passed therethroughbeneatb the log. When it is desired to raise the log clear of the ground for loading upon a railroad car, truck, platform or other point of elevation the cable and hook are passed beneath the log approximately at its longitudinal center point, the boom l3 may be positioned as shown in'Fig. 1 by rotation of hand crank 42 to Fig, 2 position with.- out adjustment of crank 35. or cable 3iv unless the operator desires to swing the end of the boom further out or back and more nearly .vertical. Rotation of hand crank 42 will move the slide beam rearwardly which with connector frame 1'. will rais the arms II and boom I3 and rotation of hand crank 35 to wind cable 3| will raisethe rear end of the boom. In the dotted line position, Fig. l, of thelog the weight of the logoiten as much as six tons,falls upon the rear wheels 2,

adapts itself t log handling and timber handling generally.

After the load has been deposited the return of the slide beam with connections and including the boom to normal position will be effected by -gravity, the sliding beam being preferably kept well oiled. Should the slide beam be dry, how

'ever, it may be returned by a slight winding of the cable 48 upon the winch, the hand crank 42 being rotated to pay out the cable 39.

A further material advantage of the present boomis that in one of its lower positions in which it is used for skidding, the weight of the boom shifts forwardly to help counterbalance the weight of the log being pulled; It has been determined that with a machine weighing six thousand pounds and the center of gravity six feet in advance of the rear wheel axis a lift power of nine thousand pounds is attainable before the front wheels leave the ground.

As the boom is raised from low to high position it moves rapidly at the start and as it nears its top position the movement is effected more easily, the slide beam 22 then travelling a considerable distance, while a short upward boom movement takes place and the nearer the boom approaches a vertical position the less back pressure is exerted upon the slide beam and connections.

I It'will be understood that various modifications may be made in the form and arrangement of the embodiment illustrated in the drawings without departing from the spirit of the invention.

What is claimed is:

1. The combination with a vehicle chassis, of a frame secured thereto, a platform disposed thereupon, ,arms pivotally supported upon said platform,-a boom, a slide beam pivotally connectedto said frame, a connector frame fast to slide beam, pivotal connection between said boom, arms and connector frame; flexible adjusting meansfor said boom connecting same to said frame, supports carried by said platform in the path of movement of said boom, standards upon said platform in the path of movement. of said pivotally connected members, means for actuating said slide beam, a winch carried by said platform, and a cable connecting said winch and b0om.

2. The combination with a vehicle chassis, of a boom, a'frame carried by said chassis, means connecting said frame and chassis to the .inner end of aid boom for moving same forwardly and rearwardly through the arc of a circle, means boom, a slide beam, a sleeve pivotally secured to said frame telescopically receiving said slide beam, a connector frame fast to slide beam, pivotal connection between said arms, boom and connector frame; flexible adjusting meansfor said boom connecting same to said frame, supports carried by said platform in the path of movement of said bocm, standards upon said platform in the path of movement of said pivotally connected members, means for actuating said slide beam to selectively dispose said pivotal connection upon said standards and said boom upon said supports, a cable connecting said boom and frame, a winch, and a cable connecting said winch and boom.

4. The combination with a vehicle chassis having rear wheels, of standards carried by said chassis forwardly of the wheel axis, supports carried by said chassis rearwardly of the wheel axis, a frame carried by said chassis forwardly of said standards, a winch carried by said chassis having its axis disposed forwardly of the wheel axis, arms pivotally secured to said chassis rearwardly of the wheel axis for movement into and out of engagement with said standards, a boom pivotally connected to said arms for movement from vertical position rearwardly of the wheel axis to horizontal position and disposal upon said supports and standards, winding cable connection between said boom and frame, a slide beam secured to said frame rearwardly of the wheel axis, connection between said slide beam and boom, a winding cable connecting said winch and boom, and means for actuating said slide beam.

5. The combination with the chassis and wheels of a vehicle, of standards carried by said chassis upon one side of the Wheel axis, supports carried by said chassis upon the other side of the wheel axis, a frame carried by said chassis upon the one side of the wheel axis, arms pivotally secured to said chassis upon the other side of the wheel axis for movement into and out of engagement with said standards, a boom, a slide beam operatively carried by said frame, a connector frame secured to the rear end of said slide beam, pivotal connection between the forward end of said boom, arms and connector frame; said connection being movable through the arc of a circle rearwardly and forwardly as said slide beam is moved rearwardly and forwardly, said boom being disposed upon said supports in one position of said slide beam, a winch carried by said chassis upon the one side of the wheel axis, load engaging means connecting said winch and the rearend of said boom, cable connection between the rear end of said boom and said frame, and actuating means for said slide beam.

6. In a hoist, a frame, pivotally supported arms rearwardly of said frame, a V-shaped boom having its open end pivotally connected to said arms, a Y-shaped connector frame having its open end pivotally connected to said arms and boom, a slide beam operatively connected to said frame secured to said connector frame, a winch connected to said boom, and a winding cable connecting said boom and frame.

DELBERT V. HELLE. 

